JPS59142614A - Numerical controller of machine tool - Google Patents

Abstract

PURPOSE:To facilitate generating a program and shorten the execution time, by providing a transfer means which transfers contents of the second register to the first register if an aperiodic asynchronous input is inputted. CONSTITUTION:When a quick return signal F is inputted, an interrupt is generated in a controller 2, and all mechanical motions of a machine tool are stopped. When a jump command D is applied to a gate 10 after the stop, the gate 10 is opened, and a jump destination cycle number in a QC register 9 is transferred to a C register 3 through the gate 10. Hereafter, the jump destination cycle number is converted to a jump destination address by an address converter 5, and a program instruction stored in this jump destination address is read out by an address register 7, and this instruction is applied to the controller 2 after stored in an instruction register 8, and the quick return operaion is started.

Description

[Detailed description of the invention] The present invention relates to a numerical control device for a machine tool.

Generally, a numerical control device for a machine tool is for controlling the operation of the machine tool according to a program stored in a memory in advance. By the way, in machine tools equipped with this numerical control device, there are often lift platforms that require K1 to dynamically execute a predetermined movement immediately in response to a certain non-periodic asynchronous input, such as overload of the spindle motor, Examples of such cases include when there is a breakdown in the truck, or when the operator wishes to perform a quick reversal.

Conventionally, as a processing method when there is such an irregular asynchronous input, the first step is to completely stop the movement of the machine tool, and then manually move the tool to the position desired by the operator. However, this method had the disadvantage that it was a manual operation and could not be performed automatically.

Another method is to divide the part that should be sent at one time into multiple transmissions, since the input can be determined as soon as the pulse distribution ends, and each time the distribution ends, the non-periodic asynchronous input is output.
There is a method in which it is determined whether the input is N or OFF, and if the non-periodic asynchronous input is ON, the process jumps to a cycle specified by the program. However, this method has the problem that the program becomes long and the execution time is long, and that the machining itself may be affected undesirably depending on the platform because the tool is repeatedly fed and stopped.

The present invention has been made in view of the problems of the conventional ones, and includes a second register that stores a jump destination cycle number in response to an instruction that declares a jump destination cycle number in response to an asynchronous asynchronous input. By providing a transfer means that transfers the contents of the input stage memory 2 register to the register that stores the execution start cycle number, the program capacity is small and program creation is easy, and the execution time can be reduced. The object of the present invention is to provide a numerical control device for a machine tool that can automatically cause the operator to make the desired movements without affecting the machine tool itself.

Embodiments of the present invention will be described below with reference to the drawings.0 FIG. 1 shows an embodiment of the present invention. In the figure, 1 is a memory consisting of an address table 1a and an instruction table 1b. Addresses corresponding to cycle numbers are stored, and program instructions for each cycle are stored in the instruction table 1b.

The program instructions consist of operation instructions that determine the operation of the machine tool in each cycle and QC instructions, which will be described later.
The above operation commands include, for example, the position of the tool in normal machining,
It consists of commands and data for determining the feed rate, etc., and commands and data for determining the operation for positioning a tool, etc. on the lifting platform to a predetermined position, which has received non-periodic asynchronous input. Additionally, the above QC command is a command that declares the jump destination cycle number to jump to the platform where the non-periodic asynchronous input was received. The same number of QC instructions as the types of operations are written at the beginning of the operation instructions of each cycle as necessary.

2Fi is a control device that sends control data and control signals to registers or gates to be described later, and decodes and executes program instructions in the memory 1.

Reference numeral 3 denotes a C register which is a register, and the C register 3 inputs an execution start cycle number, which is a cycle number at which execution of the program in the memory 1 should be started, to the control device 2.
4 is a gate that allows the execution start cycle number from the C register 3 to pass through when the control signal A from the control device 2 is received.

Further, 5 is an address translation device, which is the memory 1 mentioned above.
6 is a gate that allows the execution start address to pass through when the control signal B from the control device 2 is received.

In addition, 7Fi stores the above execution start address, and
An address register for reading out the program instruction stored at the execution start address in the memory 1; 8 is an instruction register for storing the read program instruction; this program instruction is executed by the control device 2; Then, the address register 7 receives the control signal C from the control device 2 and sequentially counts up the execution start address.

Reference numeral 9 denotes a QC register which is a second register, and this is used to input a jump destination cycle number, which is a cycle number to start execution in response to a non-regular asynchronous input, to the control device 2.
10 is used to receive and store control data E from the control device 2, and 10 opens when a jump command is applied, which is a control signal issued from the control device 2 when a non-regular asynchronous input is input to the control device 2. This is a gate that passes the jump destination cycle number of the QC register 9 and inputs it to the C register 3.
It serves as a transfer means for transferring the contents of to the C register 3.

FIG. 2 is a diagram showing the flow of operation of this embodiment, and 21
sending the execution start cycle number stored in the C register 3 to the address translation device 5, and reading the execution start address from the address table 1a by the translation device 5;
22 is a step of storing the execution start address obtained in step 21 in the address register 7; 23 is a step of addressing the instruction table 1b of the memory 1 with the execution start address stored in the address register 7 and programming the address; 24 is a step of determining whether the read program instruction is a QC instruction; 29 is a step of reading a jump destination cycle number in the QC register 9 when there is a QC instruction; 25 is a determination step for determining whether there is a jump command, 30 is a step for transferring the jump destination cycle number to the C register 3 if there is a jump command, and 26 is a process for executing a normal program command. This step is to

Further, 27 is a step for stopping the mechanical movement of the machine tool when there is an irregular asynchronous input, and 28 is a QC register 9.
This step is to send the jump destination cycle number to the C register 3.

Next, the operation will be explained.

First, a case in which normal processing is performed will be explained.

i) When this numerical control device is started, the execution start cycle number (for example, cycle O) is sent from the control device 2 to the C register 3.
The cycle number is stored in the C register 3.

11) When the control signal A is applied from the control device 2 to the gate 4, the gate 4 is opened and the execution start cycle number is sent to the address translation device 5 through the gate 4;
The conversion device 5 converts the address table 1 of the memory 1 into
The execution start address corresponding to the execution start cycle number is determined from a (see step 21 in FIG. 2).

m) When the control signal B from the control device 2 is applied to the gate 6, the gate 6 is opened and the execution start address is sent through the gate 6 to the address register 7, which registers the execution start address. In addition to storing the address (step 22), the instruction table 1 of the memory 1
The program instruction stored at the execution start address of b is read (step 23).

iV) After the read program instruction is stored in the instruction register 8, the control device 2 reads the ?? It is determined whether or not it is a QC command (step 24), and in this case, if the program command is not a QC command, it is further determined whether there is a jump command by the control device 2 (step 24).
5) In this case, since there is no jump command, the program command is decoded by the control device 2 and execution of the program is started (step 26).

(2) Then, when the control signal C is applied from the control device w2 to the address register 7, the address register 7#'i
After counting up, the address value becomes the above-mentioned execution start address plus 1.The program instruction stored at the address is read out (step 23), and after this is stored in the instruction register 8, the control device In this way, processing is performed sequentially according to the program stored in the memory 1.

vl) Also, in the above-mentioned normal processing, when a QC instruction is read, it is determined that it is a QC instruction (step 24), and then the jump destination cycle number corresponding to the QC instruction is sent to the control device 2 as control data E. is added to the QC register 9 and stored in the QC register 9 (step 29
) will happen.

Next, a case will be described in which a specific non-periodic asynchronous input, for example, a fast rewind signal F, is applied to the control device 2.

i) When the fast reversal signal F is input, an interrupt is generated in the control device 2, and all mechanical movements of the machine tool are stopped (
Step 27).

11) When the control signal D, that is, the jump command, is applied to the gate 10 after the stop, the gate 10 opens, and the jump destination cycle number of the QC register 9 is transferred to the C register 3 through the gate 10 ( Step 28).

111) After this, in the same way as in the case of normal processing, the jump destination cycle number is converted to a jump destination address by the address conversion device 5, and the program instruction stored in the jump destination address is converted by the address register 7. After the instruction is read out and stored in the instruction register 8, it is added to the trap control device 2, and a fast return operation is started.

In addition, before the above-mentioned fast reversal signal F is input, Q
If there is no C command, no examples have been stored in the QC register 9 yet, and when the fast reversal signal F is input, the machine tool will stop its mechanical operation and remain in that state. In this way, in this embodiment, each time there is a QC command, the jump destination cycle number in that cycle is
It is stored in register 9, and when there is a non-regular asynchronous input, a fast rewind operation is performed according to the operation command of the jump destination cycle number, so there is no need to provide a check program for the input, and the program capacity is reduced. It is easier to create and reduces execution time.

Note that in the above embodiment, a case was explained in which QC instructions were written in many cycles in the program.
If the operation after a non-regular asynchronous input is the same regardless of which cycle is being executed, the above QC command only needs to be written once at the beginning of the program, and in this case, program creation is even easier. become.

As described above, according to the numerical control device for a machine tool according to the present invention, there is provided a first register for storing a cycle number for starting execution, and an address conversion device for determining an execution start address corresponding to the cycle number.

A register for issuing the program instruction at the execution start address and an instruction register for storing the program instruction are provided, and a second register for storing the jump destination cycle number is provided.
Since a transfer means is provided to transfer the contents of the second register to the second register when there is a register and non-regular asynchronous input, the program capacity is small, program creation can be simplified, and the execution time can be shortened.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a numerical control device for a machine tool according to an embodiment of the present invention, and FIG. 2 is a flowchart of its operation. DESCRIPTION OF SYMBOLS 1...Memory, 3...Listor, 5...Address conversion device, 7...Address register, 8...Instruction register, 9...Second register, 10...Transfer means ( Gate ) . Patent applicant: Toyo Kogyo Co., Ltd. Agent: Patent attorney Ken Hayase - Figure 1

Claims (1)

[Claims] (1) In a numerical control device for a machine tool that operates according to a program stored in a memory, a first register storing a cycle number to start execution, and an address corresponding to the cycle number of the program from the cycle number of the first register. an address register for storing the address sent from the address converting device and reading the program from the memory, an instruction register for storing the read program instruction, and a jump destination cycle for non-periodic asynchronous input. The second one stores the jump destination cycle number by the instruction that declares the number.
A numerical control device for a machine tool, comprising: a register; and transfer means for transferring the contents of the second register to the first register when there is an irregular asynchronous input.